枸杞有哪些功效和作用？

黑枸杞味甘，性平，主要作用有:增强免疫力，抗疲劳；补肾益精，生津止渴；改善血液循环；改善睡眠；养肝明目。黑枸杞富含蛋白质、枸杞多糖、维生素、微量元素等营养成分，还富含天然原花青素(不包括红枸杞)，是原花青素含量最高的天然野生植物。

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